<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>开发界面</title>
	<style type="text/css">
		
		#app{
			width: 800px;
			margin: 0 auto;
			padding-top: 50px;
		}
	</style>
	

</head>
<body>
	<div id="app"></div>
</body>
</html>